Can I use Roxio Game Capture HD PRO to play live games on my computer display?

Yes as long as your computer display can take HDMI or Component input. Instead of connecting a TV, you can connect your computer display as an output with Roxio Game Capture HD PRO device so the video can be passed through in real time to your computer display.

You still need to connect the capture device via USB with a laptop/PC for recording though. The preview in the Capture software has about 2 second delay as it is required for the hardware to process the video.